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Long-Term Debt | 12 Months Ended
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Mar. 31, 2026
Debt Disclosure [Abstract] |
Long-Term Debt | Long-Term Debt Long-term debt consisted of the following:
| March 31, 2026 |  | March 31, 2025
U.S. Term Loan due September 2026, net of deferred debt issuance costs of zero and $126 as of March 31, 2026, and March 31, 2025, respectively | $ | — |  |  | $ | 60,873 |
2023 Incremental U.S. Term Loan due September 2026, net of deferred debt issuance costs of zero and $382 as of March 31, 2026, and March 31, 2025, respectively | — |  |  | 77,493 |
Amended U.S. Term Loan Facility due July 2030, net of deferred debt issuance costs of $503 as of March 31, 2026 | 121,372 |  |  | — |
Less current portion | (7,813) |  |  | (18,000) |
Total | $ | 113,559 |  |  | $ | 120,366 |
Senior Secured Credit Facilities Senior Secured Credit Facilities On July 24, 2025, Thermon Group Holdings, Inc., as a credit party and a guarantor, Thermon Holding Corp. (the “US Borrower”), Thermon Canada Inc. (the “Canadian Borrower”) and Thermon Europe B.V. (the “Dutch Borrower” and together with the US Borrower and the Canadian Borrower, the “Borrowers”), as borrowers, entered into a Second Amended and Restated Credit Agreement (the “Credit Agreement”) with several banks and other financial institutions or entities (the “Lenders”) and JPMorgan Chase Bank, N.A., as Administrative Agent (the “Agent”). The Credit Agreement is an amendment and restatement of that certain Amended and Restated Credit Agreement, dated September 29, 2021, by and among the Company, the US Borrower, the Canadian Borrower, the lenders time to time party thereto and JPMorgan Chase Bank, N.A. as administrative agent (the “Prior Credit Agreement”), and provides for the credit facilities described below (collectively, the “Facilities”). Facilities. •Revolving Credit Facility: A US $115.0 million five-year secured revolving credit facility made available in U.S. Dollars to the US Borrower, in Canadian Dollars to the Canadian Borrower, and in Euros to the Dutch Borrower, provided that drawings in Euros shall not exceed €20,000,000 in the aggregate (the “Revolving Credit Facility”). The Revolving Credit Facility includes sublimits for letters of credit and swingline loans. •Term Loan Facility: A US $125.0 million five-year secured term loan A (the “Term Loan”) made available in U.S. Dollars to the US Borrower (the “Term Loan Facility”). Proceeds of the Facilities were used at closing to repay and refinance existing indebtedness under the Prior Credit Agreement and pay all interest, fees and expenses related thereto, and thereafter shall be used for working capital and general corporate purposes. Accordion. The Credit Agreement allows for incremental term loans and incremental revolving commitments in an aggregate amount not to exceed the greater of US $125.0 million and amount equal to 100% of consolidated EBITDA of the Company and its subsidiaries for the most recently ended four consecutive fiscal quarter period. Maturity and Repayment. Each of the Facilities terminates on July 24, 2030. Commencing December 31, 2025, the Term Loan will amortize as set forth in the table below, with payments due on the last day of each March, June, September and December, with the balance of the Term Loan Facility due at maturity:
Quarterly Installment Dates |  | Principal Amount
December 31, 2025, through September 30, 2026 |  | 1.250%
December 31, 2026, through June 30, 2030 |  | 1.875%
Guarantees. The Term Loan, the obligations of each of the Borrowers (including the Dutch Borrower) under the Revolving Credit Facility and the obligations of the Company and its subsidiaries under “Specified Swap Agreements,” “Specified Cash Management Agreements,” “Specified Bank Guarantees” and “Specified Bond Obligations” (in each case, as such terms are defined in the Credit Agreement) owed to any Lender or any affiliate thereof are all guaranteed by the Company, the US Borrower, all of the US Borrower’s current and future wholly owned domestic material subsidiaries (the “US Subsidiary Guarantors”), the Canadian Borrower and all of the Canadian Borrower’s wholly owned Canadian material subsidiaries, if any (the “Canadian Subsidiary Guarantors”). In addition, the obligations of the Dutch Borrower under the Revolving Credit Facility will also be guaranteed by each wholly owned material Dutch subsidiary of the Dutch Borrower, if any (the “Dutch Subsidiary Guarantors”). Security. The Term Loan, the obligations of each of the Borrowers (including the Dutch Borrower) under the Revolving Credit Facility and the obligations of the Company and its subsidiaries under “Specified Swap Agreements,” “Specified Cash Management Agreements,” “Specified Bank Guarantees” and “Specified Bond Obligations” (in each case as such terms are defined in the Credit Agreement) owed to any Lender or any affiliate thereof are all secured by a first lien on substantially all of the assets of the Company, the US Borrower, the US Subsidiary Guarantors, the Canadian Borrower and the Canadian Subsidiary Guarantors, subject to certain exceptions, including 100% of the capital stock of the Canadian Borrower, the Dutch Borrower, the US Subsidiary Guarantors and the Canadian Subsidiary Guarantors, and 65% of the capital stock of the first-tier material foreign subsidiaries (other than the Canadian Borrower and the Dutch Borrower) of the Company, the US Borrower and the US Subsidiary Guarantors. In addition, the obligations of the Dutch Borrower under the Revolving Credit Facility will also be secured by a first lien on certain assets, including account rights, movable assets and receivables, of the Dutch Borrower and each Dutch Subsidiary Guarantor. Interest Rates and Fees. The US Borrower will have the option to pay interest on the Term Loan and borrowings made to the US Borrower under the Revolving Credit Facility at a base rate, plus an applicable margin, or at a rate based on Secured Overnight Financing Rate ("SOFR") plus an applicable margin. The Canadian Borrower will have the option to pay interest on borrowings made to the Canadian Borrower under the Revolving Credit Facility at a prime rate plus an applicable margin, or at a rate based on the Canadian Overnight Repo Rate ("CORRA") plus an applicable margin. The Dutch Borrower shall pay interest on borrowings made to the Dutch Borrower under the Revolving Credit Facility at a rate based on Euro Interbank Offered Rate ("EURIBOR") plus an applicable margin. Under the applicable Facilities, the applicable margin for base rate loans and Canadian prime rate loans is 50.0 basis points and the applicable margin for SOFR loans, CORRA loans and EURIBOR loans is 150.0 basis points; provided that, after December 31, 2025, the applicable margins will be determined based on a leverage-based performance grid. In addition to paying interest on outstanding principal under the Revolving Credit Facility, the US Borrower is required to pay a commitment fee in respect of unutilized revolving commitments of 0.25% per annum, provided that, after December 31, 2025, the commitment fee will be determined based on a leverage-based performance grid. Voluntary Prepayment. The Borrowers will be able to voluntarily prepay the principal of the loans outstanding under each of the Facilities without penalty or premium (subject to breakage fees) at any time in whole or in part. Mandatory Prepayment. To the extent the US Borrower receives proceeds stemming from certain asset sales, insurance claims, and debt issuances, the US Borrower is obligated to use those proceeds to pay down the Term Loan. Financial Covenants. The Company is required, on a consolidated basis, to maintain certain financial covenant ratios. On the last day of any period of four fiscal quarters ending on or after June 30, 2025, the Company must maintain a consolidated leverage ratio that does not exceed 3.50:1.00 (which ratio may be increased by 0.50:1.00 for each of the four fiscal quarters following certain acquisitions at the election of the US Borrower). In addition, on the last day of any period of four fiscal quarters ending on or after June 30, 2025, the Company must maintain a consolidated fixed charge coverage ratio of not less than 1.25:1.00. As of March 31, 2026, the Company was in compliance with all financial covenants under the Credit Agreement. Other Covenants. The Credit Agreement contains restrictive covenants (in each case, subject to exclusions) that limit, among other things, the ability of the Company and its subsidiaries (including the Borrowers) to: (i) incur additional indebtedness; (ii) grant liens; (iii) make fundamental changes; (iv) sell assets; (v) make restricted payments; (vi) enter into sales and leasebacks; (vii) make investments; (viii) prepay certain indebtedness; (ix) enter into transactions with affiliates; and (x) enter into certain restrictive agreements. The covenants are subject to various baskets and materiality thresholds, with certain of the baskets to the restrictions on the repayment of subordinated or unsecured indebtedness, restricted payments and investments being available only when the Company’s pro forma leverage ratios are less than a certain level. The Credit Agreement contains certain customary representations and warranties, affirmative covenants and events of default, including, among other things, payment defaults, breach of representations and warranties, covenant defaults, cross-defaults to certain indebtedness, certain events of bankruptcy, certain events under ERISA, judgment defaults, actual or asserted failure of any guaranty or security documents to be in full force and effect and change of control. If such an event of default occurs, the Agent will be entitled to take various actions, including the termination of the commitment for the Revolving Credit Facility, the acceleration of amounts due under the Credit Agreement and all other actions that a secured creditor is permitted to take following a default. Debt Issuance Costs The Company capitalizes and defers the costs associated with establishing our debt and financing arrangements. These costs are amortized as interest expense over the life of the loan or related financing. Additionally, for any unscheduled principal payments the Company will record incremental deferred debt charges on a pro rata basis of the unamortized deferred debt balance at the time of the repayment. When debt or the contract is retired prematurely, the proportionate unamortized deferred issuance costs are expensed as loss on retirement. Deferred debt issuance costs expensed as part of interest expense for fiscal 2026, 2025 and 2024 were $497, $486 and $489, respectively. We incurred fees to third parties in connection with our entry into the agreements described above. In fiscal 2024, in connection with the 2023 Incremental U.S. Term Loan Facility, we incurred $759 in debt issuance costs. At March 31, 2026, we had $94,287 of available borrowing capacity after taking into account amounts drawn under the Revolving Credit Facility and outstanding letters of credit totaling $1,013. The term loans bear interest at the SOFR rate plus an applicable margin dictated by our leverage ratio (as described above). The interest rate was 5.17% for the U.S. Term Loan Facility and the Revolving Credit Facility. Interest expense has been presented net of interest income on our consolidated statements of operations and comprehensive income. Maturities of long-term debt principal payments are as follows for the fiscal years ended March 31:
2027 |  | $ | 7,813 |
2028 |  | 9,375 |
2029 |  | 9,375 |
2030 |  | 9,375 |
2031 |  | 85,937 |
Total |  | $ | 121,875 |

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